In Unyamwezi Speke’s further progress was much delayed, owing to the difficulty in getting porters. The country to the east from which he had come was convulsed with wars between the Arabs and the natives. In these wars figured, as a bandit leader of handsome appearance and remarkable adventures, the celebrated Manwa Sera, a dispossessed Unyamwezi chief. In the course of these wars Speke’s principal friends amongst the Arabs were killed or disappeared. Amongst them was the celebrated Snay, the first Arab to enter Uganda, and in fact the first non-Negro to convey the news of the existence of Uganda to the civilised world. On the northwest trouble was threatened by the warlike country of Usui, whose chief, Suwarora, blocked the way to Karagwe by his extortions. To the west and north also the country was being raided by the Watuta, a mysterious race of warlike nomads who were said to be of Zulu origin, and were, according to all accounts, the furthest extension of the great Zulu invasion of East Africa, which took place in the first half of the nineteenth century. Speke attempted to recruit porters in the northern parts of Unyamwezi, but without success. He therefore returned to the headquarters of the Arabs at Kaze, and from this point sent back the last of the Hottentots to the coast. Speke, seeing that he could get no farther without bringing some order into the country, negotiated a peace between Manwa Sera and the Arabs. The peace with Manwa Sera broke down. Finally Speke decided to leave Bombay and Grant behind in northern Unyamwezi with the loads which it was impossible to transport. With such porters as he had he pushed on to the northwest and entered Buzinza, the first country ruled by Bahima chiefs.[63] Speke remarks rightly that specimens of this Hamitic (Gala) aristocracy extend from the south shores of the Victoria Nyanza southwards as far as the Fipa country and the edges of the Nyasa-Tanganyika Plateau. On pages 128 to 134 of his book[64] Speke gives an excellent description of the maddening extortions of a petty African chief. This behaviour on the chief’s part should be borne in mind when the armchair geographer is inclined to lay all the blame on the European and Arab for commencing wars with Negro tribes.